Unidirectional Invisibility Induced by PT-Symmetric Periodic Structures

Zin Lin, Hamidreza Ramezani, Toni Eichelkraut, Tsampikos Kottos, Hui Cao, and Demetrios N. Christodoulides
Phys. Rev. Lett. 106, 213901 – Published 25 May 2011

Abstract

Parity-time (PT) symmetric periodic structures, near the spontaneous PT-symmetry breaking point, can act as unidirectional invisible media. In this regime, the reflection from one end is diminished while it is enhanced from the other. Furthermore, the transmission coefficient and phase are indistinguishable from those expected in the absence of a grating. The phenomenon is robust even in the presence of Kerr nonlinearities, and it can also effectively suppress optical bistabilities.

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  • Received 11 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.213901

© 2011 American Physical Society

Authors & Affiliations

Zin Lin1, Hamidreza Ramezani1, Toni Eichelkraut2, Tsampikos Kottos1, Hui Cao3, and Demetrios N. Christodoulides2

  • 1Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA
  • 2College of Optics & Photonics-CREOL, University of Central Florida, Orlando, Florida 32816, USA
  • 3Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA

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Issue

Vol. 106, Iss. 21 — 27 May 2011

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